error while running command (no hints on what to do next)

[amarts]

2019-06-13 21:37:15,366 - ERROR - Failed bash /usr/lib/python2.7/site-packages/gluster_tester-0.1-py2.7.egg/glustertester/scripts/build-container.sh glusterfs-tester Dockerfile&>/var/log/gluster-tester/build-container.log

# cat build-container.log
Step 1/39 : FROM gluster/glusterfs-tester-base
pull access denied for gluster/glusterfs-tester-base, repository does not exist or may require 'docker login'

realized that i have to build the baseimg. But if someone forgot to read this part from readme, there is no hint of it in the log. We should give a possible hint, so one can execute the gluster-tester baseimg command

[aravindavk]

We can check if that image exists using docker images command and automatically create base image if not available.

[amarts]

That would be good too.